Baffle for steam and water boiler drums



Oct. 24, 1933. J. c. HOBBS BAFFLE FOR STEAM AND WATER BOILER DRUMS Original Filed April 6, 1926 m INVENTOR BY W IJM ATTORNEKS 45 the plates to the other, and the plates terminate Patented Oct. 24, 1933 oFFicE BAFFLE: FOR-STEAM AND WATER BOILER DRUMS James. 0. Hobbs, Painesville, Ohio Application April 6, 1926, Serial No. 100,027 Renewed January 21, 1933 t 11iClaims. (o1.122 49 1) mediately settles out and reaches the water This invention relates to a device for separating water from the'mixture of steam and Water that enters thesteam and water drum of a boiler, and will be understood from the description in connection with the accompanying drawing, in which Fig. 1 is a section through a steam and water drum of a boiler showing an embodiment of the invention; Fig. 2 is a perspective ViGW, partly broken away; Fig. 3 is a section along the line 3-3 of Fig. 1 and Fig. 4 is a perspective viewof the drum, partly broken away, showing the device installed therein. In the drawing,; reference character indicates a steam and water drum, to which are connected' the usual steam and Water tubes 11, the

nipples 12 thatlead to the downtake headers (not shown), and a pipe 13 for the dry steam. The battle is madeup of plates 15, 16 and 17, the plate 15 being connected to the plate 16 by means of bolts '18, and the plate 16 being conected tothe plate 17 by means of bolts 19. These plates are so connected by the bolts 18 and 19 that they are. substantially parallel to each other, and spaces are left between edges of the plates to permitthe passage of steam or steam and Water. The upper edge of the plate 15 is connected by means of the web 20 to the inside of the drum above the normal water level therein, and the lower edge of the plate 17 is similarly connected to the inside of'the drum below the water level, by means of the web 21. The baiiie is installed in the drum, preferably on the other side ofthe center line thereof from the inlet tubes 11, and also preferably at an angle to the horizontal. The plates and the webs entirely close the space between opposite sides or" the drum, except for the spaces between the, plates and spaces between the. ends of the plates and the ends of thedrum when the plates are made shorter than the inside of the drum.

Theplates l5 andlfiare'provided with troughs 22 and Y23 on therotherside of the plates from the tubes v11 at their lower edges, by bending the metal twice at right-angles, as indicated in the drawing. These troughs extend from one end of a short distance from the ends of the drum. The troughs 22 and 23 may be provided with one or more spouts 24 and 25, the spouts 24 being long enough to extend below the water level in the drum 10, and the spouts 25 extending a considerable distance below the trough 23.

The operation is as follows: The mixture of steam and water enters the drum 10through the inlet pipes 11, and a part of the water imspace of the drum, while the steam and entrained water strikes the lower face of the plate 15', which causes more of the water to'separate and trickle down this plate, while the steam and a part of the water passes through the spacebetween the lower edge of the plate 15 and the upper edge .of the plate 16, to the other sideof the bafiie. The water trickling down the upper side of the plate 16 is caught by the trough 23, and either runs to the end of the trough where it drops into the water in the drum, or passes through the spouts 25 to the same. More water from the steam may collect onth'e other face of the plate 15, and trickle down into the trough 22 and pass to the ends of the trough and drop into the water, or when spouts 24 are provided, the Water will pass through these ,spouts and join the remainder of the water, in the drum. As the lower ends of the spouts 24extend below the water level in the drum 10, the water that will notlbe entrainedby steam passing through the space between the plates 15'and 16. Steam carrying entrained Water will also pass through the space between the upper edge of the plate 1'7 and the lower edgeof the plate 16, in a man ner similarto that already described, and this Water will be separated therefrom in a similar way, the spouts 25 extending downwardly to a trickles down the upper edge of the plate15 sufliicent extent to prevent water passing out of these spouts'from being again caughtup by the steam passing through the space between the plat esof the baflie. 7

I claim: v I I l 1. ,In combination, a boiler drum having steam and water inlet pipes, a baffle disposed across the ends of said pipes and spaced therefrom to define a space into which steam and water from all of said pipes may discharge, said baffle comprising a plurality of substantiallyparallel plates spaced apart but overlapping one another to permit passage of steam'through said bafile with an upper plate overlapping a lower plate on the side of said lower plate remote from the inlet pipes, and said upper plate being provided with a trough adjacent its lower edge.

2. In combination, a boiler drum having steam and water inlet pipes and a steam outlet, a baflle extending across said drum between said inlet pipes and said outlet and forming a chord the side of the lower plate remote from said inlet pipes, said upper plate having a trough adjacent its lower edge on the side remote from said inlet pipes.

3. In combination, a boiler drum having steam and water inlet pipes, a steam outlet and a bafiie extending across said drum between said inlet pipes and said outlet and inclined to the horizontal, said baffle having an opening therein for the passage of steam therethrough, and a trough on said bafiie beneath said opening on the side remote from theinlet pipes.

4. In combination, a boiler drum having steam and water inlet pipes, a steam outlet and baffle extending across said drum between said inlet pipes and said outlet and inclined to the horizontal, said baflie having an openingtherein for the passage of steam therethrough, a trough on said bafile beneath said opening on the side remote from the inlet pipes, and a spout leading from said trough beneath the normal water level in said drum. a

5. In combination, a boiler drum having steam and water inlet pipes, a bafiie disposed across the ends of said pipes and spaced therefrom to define aspace into which steam and water from all of said pipes may discharge, said baflie comprising a plurality of substantially parallel plates spaced apart but overlapping one another to permit passage of steam through said baffle with an upper plate overlapping a lower plate on the side of said lower plate remote from the inlet pipes, said upper plate being provided with a trough adjacent its lower edge, and a spout leading from said trough beneath the normal water level in'said drum.

6. In combination, a boiler drum having steam and water inlet pipes, a bafile disposed across the ends of said pipes and spaced therefrom to define a space into which steam and water from all of said pipes may discharge, said baffle comprising a plurality of substantially parallel plates spaced apart but overlapping one another to permit passage of steam through said bafiie, with an upper plate overlapping a lower plate on the side of said lower plate remote from the inlet pipes, and a trough disposed on said lower plate beneath the lower edge of the upper plate and on the side remote from the inlet pipes.

7. Incombination, a boiler drum having steam and water inlet pipes, a baiiie disposed across the ends, of said pipes and spaced therefrom to define a space into which steam and water from all of said pipes may discharge, said bailie comprising aplurality of substantially parallel plates spaced apart but overlapping' one another to permit passage of steam through said baffle, with an upper plate overlapping. a lower plate on the side of said lower plate remote from the inlet pipes, a trough disposed on said lower plate beneath the lower edge of the upper plate and on the side remote from the inlet pipes, and a second trough adjacent the lower edge of said l upper plate and on the side remote from the inlet pipes.

8. In a boiler, a drum having steam and water spaces, inlet pipes arranged to discharge steam and water mixture into said steam space, a steam outlet, a baiile extending across the drum and into the steam and water spaces thereof, said baflie being disposed between the inlet and the outlet and dividing the drum into two chambers of unequal size, with the larger chamber receiving the steam and water from said pipes, means sealing the lower part of the baiile to the drum, and means forming a passage for steam through the upper part of the baffle within said steam space.

9. In a boiler, a drum having steam and water spaces, inlet. pipes arranged to discharge steam and water mixture into said steam space, a steam outlet, a baiiie extending across the drum and into the steam and water spaces thereof, said bafiie being disposed between the inlet and the outlet and dividing the drum into two chambers of unequal size, with the larger chamber receiving the steam and water from said pipes, means sealing the lower part of the baffle to the drum, and means forming a passage for steam through the upper part of the bafiie within said steam space, said pipes discharging steam and water approximately horizontally into the drum, and said baflle being inclined to the horizontal, with the lower part of the baflie further from the inlet pipes than the upper part. I

10. In a boiler, a drum having-steam and-water spaces, inlet pipes arranged to discharge steam and water mixture into said steam space, a steam outlet, a baiiie extending across the drum and into the steam and water spaces thereof, said bafflebeingdisposed between the inlet and the outlet and dividing the drum' into two chambers of unequal size, with the larger chamber receiving the steam and water from said pipes, means sealing the lower part of the bailie to the drum, said pipes discharging steamand water approximately horizontally into the drum,.

and said baiile being inclined to the horizontal with the lower part or the 'baiiie further from the inlet pipes than the upper part, the baffle being formed of overlap-ping plates, with an upper plate overlapping a lower plate on the side of the lower plate remote from the inlet pipes.

11. In a boiler, a steam and water drum hav-' ing steam and water inlet pipes discharging into the steam space of the drum in a generally horizontaldirection, a steam outlet 'from'said drum, downcomer connections leading from the lower part of the drum, a bafiiej extending across the drum between said inlet pipes and said outlet and into the steam and water spaces thereof, said bafiie being inclined to the horizontal, with the top of the bafiie nearer the inlet pipe than the bottom, means sealing the bottom of the bailie to the drum on the side of the downcomer connections remote from the inlet pipes, and means forming a passage for steam through said bafile. 7

JAMES c. HOBBS. 

